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Information Seminar Paper

Title

EFFECTS OF ASPHALTENE CONTENT AND TEMPERATURE ON VISCOSITY OF IRANIAN HEAVY CRUDE OIL: EXPERIMENTAL STUDY

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Abstract

 HEAVY AND EXTRA HEAVY CRUDE OILS USUALLY HAVE HIGH WEIGHT PERCENTAGE OF ASPHALTENE WHICH COULD INDUCE MANY PROBLEMS DURING PRODUCTION TO REFINING PROCESSES. ALSO, ASPHALTENE HAS MAIN ROLE ON THE HIGH VISCOSITY OF THE HEAVY AND EXTRA HEAVY CRUDE OILS. IN THIS PAPER EFFECTS OF ASPHALTENE CHARACTERISTICS ON THE CRUDE OIL RHEOLOGICAL PROPERTIES HAVE BEEN EXPERIMENTALLY INVESTIGATED. THE RESULTS OF EXPERIMENTAL STUDY INDICATE THAT THE VISCOSITY OF THE RECONSTITUTED HEAVY OIL SAMPLES IS INCREASED EXPONENTIALLY AS ASPHALTENE CONTENT INCREASE AT CONSTANT TEMPERATURE. FOR EXPERIMENTAL INVESTIGATION, THE ASPHALTENE WAS FIRSTLY PRECIPITATED FROM THE ORIGINAL HEAVY CRUDE OIL AND TEN WELL-DEFINED RECONSTITUTED HEAVY OIL SAMPLES ARE SUPPLIED BY DISPERSING THE ASPHALTENE INTO THE MALTENE (I.E., DEASPHALTED HEAVY CRUDE OIL) AT A WIDE RANGE OF THE TEMPERATURE FROM 25 OC TO 85 OC, RESPECTIVELY. THEN, THE VISCOSITY OF THE PREPARED RECONSTITUTED HEAVY OIL SAMPLES WAS MEASURED USING A ROTATIONAL RHEOMETER AT SEVEN DIFFERENT TEMPERATURES. THE VISCOSITY OF THE HEAVY OIL SAMPLES HIGHLY DECREASES WITH INCREASING THE TEMPERATURES FROM 25 OCTO 85 OC AT CONSTANT ASPHALTENE VOLUME FRACTION, RESPECTIVELY.

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